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Determination of hexachlorophene content of soaps using ferric chloride reagent
Author(s) -
Larson Harry L.
Publication year - 1951
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02648651
Subject(s) - hexachlorophene , chemistry , barium chloride , reagent , ferric , chloride , potassium , alcohol , organic chemistry , chromatography
Summary Hexachlorophene is determined in soap by measuring the color produced by reaction with ferric chloride in alcohol solution with controlled conditions of time and temperature. The precision is within ±5% of the hexachlorophene content at the 1/2% level or above. As a criterion, any soap that will give a finely dispersed barium soap and that does not form a precipitate with ferric chloride under the conditions of the method give good results. This includes all milled bar soaps. The effect of phenolic perfume ingredients on the result is negligible. Five per cent abietic acid in the fatty acid composition has no effect on the result. The method is slightly modified for use with liquid potassium soaps.